Elasticity and Toughness in Materials and Hardware

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What property is indicated by a metal's letter designation separated from the alloy designation by a dash?

Ductility

Malleability

Hardness (correct)

Tensile strength

Which type of steel does not accept heat treatment?

Medium-carbon steel

Manganese steel

High-carbon steel

Low-carbon steel (correct)

What property makes medium-carbon steels especially adaptable for machining or forging?

Desirable surface hardness

High ductility

High hardness

Ability to accept heat treatment (correct)

Which alloying agent acts as a hardener when alloyed with steel?

Silicon Signup and view all the answers

In what applications are high-carbon steels primarily used?

Springs, files, and cutting tools Signup and view all the answers

What characteristic makes Mangalloy unique?

Extreme anti-wear properties Signup and view all the answers

Which property refers to a metal's tendency to return to its original shape after stretching and bending?

Elasticity Signup and view all the answers

What property describes a material's ability to resist tearing or breaking when bent or stretched?

Toughness Signup and view all the answers

When a metal can carry heat or electricity, it is said to have good ____________.

Conductivity Signup and view all the answers

What is the term for the property of a metal to expand when heated and shrink when cooled?

Thermal Expansion Signup and view all the answers

Which property involves a material's ability to absorb heat before conducting or carrying it away?

Conductivity Signup and view all the answers

Metals that can carry heat also carry ____________, making them good electrical conductors.

'Electrons' Signup and view all the answers

What can be added to steel to counteract the negative effects of sulphur?

Manganese Signup and view all the answers

How does phosphorus affect low-carbon steel's resistance to atmospheric corrosion?

Improves resistance Signup and view all the answers

What does nickel contribute to steel during the heat treatment process?

Adds strength and hardness Signup and view all the answers

What effect does manganese have on a metal's forging characteristics?

Makes it less brittle at rolling and forging temperatures Signup and view all the answers

How does adding small amounts of sulphur affect the machinability of steel?

Improves machinability Signup and view all the answers

What undesirable effect does sulphur have on steel when rolled or forged?

Causes brittleness Signup and view all the answers

What is the main characteristic of chromium steel?

Increased wear and corrosion resistance Signup and view all the answers

How does nickel contribute to steel when alloyed with chromium?

Toughens steel Signup and view all the answers

What is the primary purpose of molybdenum in aircraft structural steel?

To reduce grain size and increase impact strength Signup and view all the answers

Why is chrome-moly steel an ideal choice for landing gear structures?

Excellent wear resistance Signup and view all the answers

What type of steel alloy does vanadium produce when combined with chromium?

Strong, tough, and ductile Signup and view all the answers

In what components are ball bearings typically made, according to the text?

Chrome-vanadium steel Signup and view all the answers

What is the primary element responsible for the mechanical properties of steel?

Carbon Signup and view all the answers

What is the main objective of heat treatment in steel?

Change physical and mechanical properties Signup and view all the answers

Why are high-carbon steels particularly suitable for heat treatment?

They respond well to heat treatment Signup and view all the answers

What does the annealing process do to steel?

Softens and relieves internal stress Signup and view all the answers

Which material exceeds commercial use compared to any other material?

Steel Signup and view all the answers

How does heat treatment impact product performance in manufacturing processes?

By increasing strength or other desirable characteristics Signup and view all the answers